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Atrial fibrillation detection by heart rate variability in Poincare plot.
Jinho Park1, Sangwook Lee, Moongu Jeon
1Department of Information and Communications, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju, Republic of Korea. jinho@gist.ac.kr
Biomedical Engineering Online
|December 17, 2009
Summary
This study developed an automated algorithm using Poincare plots of heartbeats to detect atrial fibrillation (AFib). The system achieved high accuracy, offering a portable solution for early AFib monitoring in elderly individuals.
Area of Science:
- Cardiology
- Biomedical Engineering
- Signal Processing
Background:
- Atrial fibrillation (AFib) is a major cause of stroke, with risk increasing with age.
- Early detection of AFib is crucial to prevent progression to more severe forms.
- A portable AFib monitoring system is needed for continuous surveillance, especially in the elderly population.
Purpose of the Study:
- To develop an automated algorithm for early detection of atrial fibrillation (AFib).
- To create a portable system for continuous AFib monitoring.
- To analyze heart rate variability using Poincare plots for AFib characterization.
Main Methods:
- Inter-beat intervals were analyzed using a wavelet-based detector.
- Poincare plots were generated from inter-beat intervals to extract features.
- Features including cluster count, mean stepping increment, and point dispersion were used with k-means clustering and support vector machines for classification.
Main Results:
- Poincare plots from non-AFib data showed regular patterns with limited or one cluster.
- AFib data exhibited irregularly irregular shapes with one or too many clusters.
- Leave-one-out cross-validation yielded mean sensitivity of 91.4% and mean specificity of 92.9%.
Conclusions:
- Inter-beat intervals, less affected by noise, are reliable for AFib diagnosis.
- Poincare plots effectively visualize heart rate variability for AFib detection.
- An automated, portable algorithm was designed for non-invasive AFib monitoring.
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